1972549247 has 2 divisors, whose sum is σ = 1972549248. Its totient is φ = 1972549246.

The previous prime is 1972549213. The next prime is 1972549259. The reversal of 1972549247 is 7429452791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1972549247 - 2¹² = 1972545151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1972549195 and 1972549204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972549147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986274623 + 986274624.

It is an arithmetic number, because the mean of its divisors is an integer number (986274624).

Almost surely, 2^1972549247 is an apocalyptic number.

1972549247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972549247 is an equidigital number, since it uses as much as digits as its factorization.

1972549247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 1972549247 is about 44413.3904019948. The cubic root of 1972549247 is about 1254.1301776360.

The spelling of 1972549247 in words is "one billion, nine hundred seventy-two million, five hundred forty-nine thousand, two hundred forty-seven".